import a
import b
import c

# print(id(a))
# print(id(b.a))

# print(id(c.y))
# print(id(b.c.y))

# x = 100
# print(x)
# print(a.x)
# a.x = 10
# print(b.a.x)
# print(a.x)
# print(b.x)
# b.x = 100
# print(b.foo())

# print(id(c))
# print(id(b.c))

# c.y = 20
print(b.bar())
print(b.x)